Pod Communication Failure Due to Network Policy Misconfiguration

Pods failed to communicate due to a misconfigured NetworkPolicy that blocked ingress traffic.

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What Happened

A newly applied NetworkPolicy was too restrictive, preventing communication between certain pods within the same namespace.

Diagnosis Steps

1Used kubectl get networkpolicies to inspect the NetworkPolicy.
2Identified that the ingress rules were overly restrictive and did not allow traffic between pods that needed to communicate.

Root Cause

The NetworkPolicy did not account for the required communication between pods.

Fix/Workaround

• Updated the NetworkPolicy to allow the necessary ingress traffic between the affected pods.
• Re-applied the NetworkPolicy and tested communication.

Lessons Learned

Network policies need to be tested thoroughly, especially in multi-tenant or complex networking environments.

How to Avoid

1Use staging environments to test NetworkPolicy changes.
2Apply policies incrementally and monitor network traffic.

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